Science, Tech, Math › Science Table of Densities of Common Substances Compare the Densities of Solids, Liquids, and Gases Share Flipboard Email Print Cultura RM Exclusive/Getty Images Science Chemistry Periodic Table Basics Chemical Laws Molecules Projects & Experiments Scientific Method Biochemistry Physical Chemistry Medical Chemistry Chemistry In Everyday Life Famous Chemists Activities for Kids Abbreviations & Acronyms Biology Physics Geology Astronomy Weather & Climate by Anne Marie Helmenstine, Ph.D. Dr. Helmenstine holds a Ph.D. in biomedical sciences and is a science writer, educator, and consultant. She has taught science courses at the high school, college, and graduate levels. Updated May 06, 2019 Here's a table of densities of common substances, including several gases, liquids, and solids. Density is a measure of the amount of mass contained in a unit of volume. The general trend is that most gases are less dense than liquids, which are in turn less dense than solids, but there are numerous exceptions. For this reason, the table lists density from lowest to highest and includes the state of matter. Note that the density of pure water is defined to be 1 gram per cubic centimeter (or, g/ml). Unlike most substances, water is denser as a liquid than as a solid. A consequence is that ice floats on water. Also, pure water is less dense than seawater, so fresh water can float on top of salt water, mixing at the interface. The Factors That Affect Density Density depends on temperature and pressure. For solids, it's also affected by the way atoms and molecules stack together. A pure substance can take many forms, which don't have the same properties. For example, carbon can take the form of graphite or diamond. Both are chemically identical, but they do not share an identical density value. To convert these density values into kilograms per cubic meter, multiply any of the numbers by 1000. Densities of Common Substances Material Density (g/cm3) State of Matter hydrogen (at STP) 0.00009 gas helium (at STP) 0.000178 gas carbon monoxide (at STP) 0.00125 gas nitrogen (at STP) 0.001251 gas air (at STP) 0.001293 gas carbon dioxide (at STP) 0.001977 gas lithium 0.534 solid ethanol (grain alcohol) 0.810 liquid benzene 0.900 liquid ice 0.920 solid water at 20°C 0.998 liquid water at 4°C 1.000 liquid seawater 1.03 liquid milk 1.03 liquid coal 1.1-1.4 solid blood 1.600 liquid magnesium 1.7 solid granite 2.6-2.7 solid aluminum 2.7 solid steel 7.8 solid iron 7.8 solid copper 8.3-9.0 solid lead 11.3 solid mercury 13.6 liquid uranium 18.7 solid gold 19.3 solid platinum 21.4 solid osmium 22.6 solid iridium 22.6 solid white dwarf star 107 solid Continue Reading Know the Difference Between Density and Specific Gravity The Density of Common Rocks and Minerals Know the Density of Air at STP Many Math Equations and Problems Begin With the Density of Water Discover the Density of Common Substances Learn the Weight of a Cloud Density Test Questions with Answers (Prove You Are Not Too Dense) Ever Wondered Why and How Ice Floats on Water? Densities of the Chemical Elements This Example Shows How to Calculate Density Scientific Explanation of Why Ice Floats What Is Water? Here's How Heat Transfer and Convection Currents Work Interesting Chemistry Facts What Relative Density Means in Chemistry What Is the Lightest Metal?